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Freight Class Calculator

With this tool, you can estimate the classification and cost of your shipping goods instantly.

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Freight Class Calculator

Use this freight class calculator to determine the freight class based on your pallet’s weight and dimensions, including length, width, and height. Identifying the correct freight class helps you estimate shipping costs when using Less-Than-Truckload (LTL) carriers. This freight class calculator is designed to calculate:

Freight Class
Volume
Density
Estimated Freight Cost

What Is a Freight Class?

Freight class, also known as the National Motor Freight Classification (NMFC), is a standardized system used to determine shipping rates for transporting goods. Developed by the National Motor Freight Traffic Association (NMFTA), it categorizes freight into different classes. Each product is assigned a unique NMFC code, which corresponds to a specific freight class and helps carriers determine shipping costs.

Freight Classification Chart

There are 18 NMFC freight classes, ranging from 50 to 500. Freight that is easier to handle and has higher density is assigned a lower class and lower shipping rates. As freight class increases, the cost per hundred pounds also increases. The table below summarizes each class:

Freight Class Code	Type of Freight	Weight per ft³
50	Durable freight that fits on a standard 4′ × 4′ pallet	50+ lbs
55	Bricks, cement, hardwood flooring, construction materials	35–50 lbs
60	Car accessories and auto parts	30–35 lbs
65	Auto parts, boxed books, bottled beverages	22.5–30 lbs
70	Auto parts, engines, packaged food items	15–22.5 lbs
77.5	Tires and bathroom fixtures	13.5–15 lbs
85	Crated machinery and cast iron stoves	12–13.5 lbs
92.5	Computers, monitors, refrigerators	10.5–12 lbs
100	Car covers, canvas, boat covers, wine cases, caskets	9–10.5 lbs
110	Cabinets, framed artwork, table saws	8–9 lbs
125	Small household appliances	7–8 lbs
150	Auto sheet metal and bookcases	6–7 lbs
175	Clothing, sofas, and stuffed furniture	5–6 lbs
200	Sheet metal parts, aluminum tables, packaged mattresses, aircraft parts	4–5 lbs
250	Mattresses, box springs, plasma TVs, bamboo furniture	3–4 lbs
300	Model boats, assembled chairs and tables, wooden cabinets	2–3 lbs
400	Deer antlers	1–2 lbs
500	Gold dust, ping pong balls	< 1 lb

Factors That Determine Freight Shipping Class

Four key factors determine a shipment’s freight class, which helps categorize it accurately:

Density: Weight relative to size (Weight ÷ Volume). Higher density usually means a lower freight class.
Liability: Risk of damage, loss, or causing damage to other shipments. Higher risk leads to higher class.
Handling: Complexity of loading/unloading. Difficult-to-handle freight has higher class.
Stowability: How easily freight fits in a shipping container. Bulky or irregular items usually have higher class.

How Do You Calculate Freight Class?

Follow these steps to calculate freight class manually:

Measure dimensions: Length, width, and height of the pallet.
Calculate volume: Multiply dimensions to get cubic feet.
Determine weight: Weigh shipment in pounds.
Calculate density: Density = Weight ÷ Volume. Use density to find the appropriate freight class.

Example

Shipping a box of books: 18" × 12" × 10", weighing 40 lbs.

Step 1 – Volume:

Volume = 18 × 12 × 10 = 2,160 in³ = 2,160 ÷ 1,728 = 1.25 ft³

Step 2 – Density:

Density = 40 ÷ 1.25 = 32 lbs/ft³

Check density against the freight classification chart to determine the correct class.

Freight Class Calculator

Freight Class Calculator

What Is a Freight Class?

Freight Classification Chart

Factors That Determine Freight Shipping Class

How Do You Calculate Freight Class?

Example

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